8/JG53 or III/JG53 no problem, but better to use the staffel designator to narrow it down, there were some colour changes for the staffeln through the years as well as increasing of gruppen from 3 to 4 staffels which in turn changed the staffeln numbers within a gruppe. So 8 Staffel can be in III gruppe when each had 3 making up the strength but when they increased to 4, the 8th then became part of II gruppe, and then the colour changed for the numbers....